Submission #423524

#	Time	Username	Problem	Language	Result	Execution time	Memory
423524		victoriad	Martian DNA (IOI16_dna)	C++14	36 / 100	26 ms	384 KiB

dna

#include "dna.h"

#include <cstdlib>
using namespace std;
std::string analyse(int n, int t) {
    string s;
	string pr;
	int x=0;
	pr.push_back('0');
	if(make_test(pr)){
		x++;
		bool final=false;
		bool principio=false;
		s=pr;
		while(x<n){
			pr=s;
			if(!final){
			pr.push_back('0');
			if(make_test(pr)){
				s=pr;
				x++;
			}
			else{
				pr.pop_back();
				pr.push_back('1');
				if(make_test(pr)){
					s=pr;
					x++;
				}
				else{
					final=true;
				}
			}
			}
			if(!principio){
				string p;
				p.push_back('0');
				for(int i=0;i<s.size();i++)p.push_back(s[i]);
				if(make_test(p)){
					s=p;
					x++;
				}
				else{
					p[0]='1';
					if(make_test(p)){
						s=p;
						x++;
					}
					else{
						principio=true;
					}
				}

			}
			
		}
	}
	else{
		for(int i=0;i<n;i++)s.push_back('1');
	}
	return s;
}  

Compilation message (stderr)

dna.cpp: In function 'std::string analyse(int, int)':
dna.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |     for(int i=0;i<s.size();i++)p.push_back(s[i]);
      |                 ~^~~~~~~~~
grader.cpp: In function 'bool make_test(std::string)':
grader.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
grader.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |  for (int i = 1; i <= ss.size(); i++) {
      |                  ~~^~~~~~~~~~~~
grader.cpp:28:13: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |   if (pr[i] == p.size()) {

• Subtask 1: 11 / 11
• Subtask 2: 25 / 25
• Subtask 3: 0 / 64